Nut-lock.



No. 669,839. Ratented Mar. I2, 1901.

J. W. JONES &. J. HELMER.

NUT LOCK.

(Application filed Sept. 11, 1900.)

(No Model.)

. v INVENTOR W.- T'MESSES." J'OMLWZFJECQ,

JMe h/Hezme? jl/QNQU 0104mm; wnsuluawm n. c.

NITED STATES PATENT OFFICE.

JOHN W. JONES AND JOSEPH HELMER, OF GRAND RAPIDS, MINNESOTA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 669,839, dated March 12, 1901.

Application filed September 11, 1900. Serial No. 29,680. \No model.)

To aZZ whom it may concern.-

Be it known that we, JOHN W. JONES and JOSEPH HELMER,citizens of the United States, residing at Grand Rapids, in the county of Itasca, State of Minnesota, have invented certain new and useful Improvements in Nut- Locks, of which the following is a description, reference being had to the accompanying drawings and to the letters of reference marked thereon.

Our invention relates to the class of nutlocks in which a wedge or key is caused to engage with the side of a nut to prevent it from rotation on the bolt on which it is screwed; and our invention consists in the construction and combination of elements hereinafter de scribed and claimed.

In the accompanying drawings, forming part of this specification, Figure 1 is a plan view of one form of our invention. Fig. 2 is a vertical section on line 2 2 of Fig. 1. Fig. 3 is a side view of the form shown in Fig. 1. Fig. 4 is a perspective view of the key shown in Fig. 1. Fig. 5 is a plan view of a modification.

In the drawings, A is a base-plate through which the bolt B passes and on which the nut O bears. The base-plate is secured against rotation by any convenient means. In the form shown in Figs. 1, 2, and 3 the means shown for this purpose consists of projections ct on the under surface of the base-plate adapted to enter the material through which the bolt passes. If this material is metal, it will be necessary to cut recesses to receive these projections. It will not usually be necessary to cut recesses in wood. If preferred, the

. base-plate may be held from rotation by means of angular-headed screws inserted in the material through which the bolt passes, fitting correspondingly-shaped recesses in the baseplate, as shown in Fig. 5. When these screws are used, they should be first screwed to place and the base-plate then placed over them. In the upper face of the base-plate is cut a shallow groove D at such distance from the center that the groove will be partly beneath one edge of the nut C. The outer edge of this groove is preferably slightly undercut in the form shown in Figs. 1, 2, 3, and 5. In the groove is received a key E, having a horizontal portion e, adapted to fit under the edge of the nut (J, and a vertical portion e, adapted to fit against the side of the nut. The outer face of the key is inclined to fit the undercut at the outer edge of the groove. The key may be made slightly tapering throughout its length; but we prefer to make it tapering near its outer end only, so as to form a head E, which prevents its being driveninto the groove beyond a definite point. After the nut Chas been screwed to position it is locked against unscrewing by inserting the key E in the groove, with its portion e under the edge of the nut and its vertical portion 6 fitting against the side of the nut. When the key is in position, it may be held against accidental removal by any convenient means, such as a split pin; but we prefer to use for this purpose the special means which we have shown.

In the form of key shown in Figs. 1 to 4 we split the inner end of the key by a vertical cut in line with the inner edge of the vertical portion e, forming a tongue e adapted to be bent upward against the side of the nut, as indicated in dotted lines in Fig. 4, and by a horizontal cut on or above the plane of the horizontal portion 6 of the key, forming a tongue c adapted to be bent over against the side of the nut, as shown in dotted lines in Fig. 1 and also in Fig. 4.

In the form shown in Fig. 5 a spring-tongue E is pivoted on the upper face of the key E. This tongue has at its free end an angular extension E adapted to engage the corner of the nut. This extension also extends downward to engage the inner face of the vertical portion of the key. By lifting slightly the free end of this spring-tongue it may bewith drawn from engagement with the nut to permit the removal of the key.

It will of course be understood that while we have shown square nuts our invention is equally applicable to nuts having six or any other even number of sides.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. In a nut-lock the combination with a base-plate having a broad open groove in its upper face, with its outer edge undercut, means for preventing the rotation of the baseplate, a bolt passing through the base-plate and a nut on said bolt extending over a portion of said groove and forming therewith a rectangular keyway, of a key having its outer face beveled to fit the undercut edge of the groove and having a portion thereof adapted to fit the keyway formed between the groove and the lower face of the portion of the nut which extends over the groove and a vertical port-ion adapted to fit against the side of the nut to prevent its rotation, and means for preventing the withdrawal of the wedge or key, substantially as described.

2. In a nut-lock, the combination with a base-plate having a tapering groove in its upper face, means for preventing the rotation of the base-plate, a bolt passing through the base-plate and a nut on said bolt extending over a portion of said groove, of a tapering key having a portion thereof fitting the portion of the groove beneath the edge of the nut, and a vertical portion fitting against the side of the nut to prevent its rotation, the narrow end of the wedge or key being split at its inner end whereby one or more of the split portions are adapted to be bent against the side of the nut to prevent the withdrawal of the wedge or key, substantially as described.

3. In a nut-lock, the combination with a] base-plate having a tapering groove with its outer edge undercut in its upper face, means for preventing the rotation of the base-plate, a bolt passing through the base-plate and a nut on said bolt extending over a portion of said groove, of a tapering key having its outer face beveled to fit the undercut edge of the groove and having a portion thereof fitting the portion of the groove beneath the edge of the nut and a vertical portion fitting against the side of the nut to prevent its rotation, the narrow end of the wedge or key being split at its inner end whereby one or more of the split portions are adapted to be bent against the side of the nut to prevent the Withdrawal of the wedge or key, substantially as described.

In testimony whereof we afiix our signatures in presence of witnesses.

JOHN W. JONES. JOSEPH HELMER. Witnesses to the signature of John W. Jones:

E. H. SKILLE, O. L. ISTED. Witnesses to the signature of Joseph Helmer:

A. P. GREELEY, GRACE P. BRERETON. 

